Diy speaker driver project going on..

[Otherwise]

I mentioned before in diy driver thread that I would have a pair of Monacor sp-200x lying around. So, the project has started, here's two pics about the frames. I took em from 5,25" car speakers. Sp-200x's cone is quite deep so the frames needed lifting rings (where the surrounds are glued on). Magnets are from sp-200xs. Monacor's voice coils seem to be of good quality, they have some holes in them and the linear displacement is about +/- 2mm.

 

[Otherwise]

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[tom1356]

What are the goals for your project?
Please keep us posted on your progress.

 

[Otherwise]

I put more pictures to my homepage. The almost finished driver sound too good 😎

project page

 

[stokessd]

I would love to see some measurements of the driver when you are finished. I've often toyed with the idea of building a driver from vendor parts.

Sheldon

 

[Otherwise]

.. and I would love too to see measurements! Unfortunately I don't have any good microphone yet

Although I did install speaker workshop. I understood that simple measurements could be done just with it, a microphone (panasonic,monacor?) and a soundcard? But we'll see if I have enough inspiration for learning to use spk workshop..

 

[claudio]

SW

Hi,
maybe this site could help you out in using Speaker Workshop.
http://planeta.terra.com.br/educacao/claudionegro/english/

Regards

Claudio

 

[Otherwise]

I measured parameters, they don't differ very much. I was expecting worse Qes (took the ferrofluid away) but it seems to be quite same. Vas is very approximate due to my poor test box.. 🙄 Suspension is now stiffer and the cone is about half the weight it was.

Fs: 82 Hz
Vas: 2 L
Qts: 0,54
Qes: 0,67
Qms: 2,88

Monacor original